Rotary sand-drier.



S. J. BINGHAM.

ROTARY SAND DRIER.

APPLICATION FILED JAN.11,1911.

997,896. Patqnted July 11,1911.

2 SHEETSSHEET 1.

s. J. BINGHAM.

ROTARY SAND DRIER.

APPLICATION FILED JAN. 11,1911. 997,896, Patented July 11, 1911.

2 SHEETS-SHEET 2.

ffzz zowaa v s'AMuEL J. BINGHAYM, or SAN Marne, cnmrortmn. v1

Romany SAN -name.

, Specification of Letters Patent.

Patented July it, fair.

Application filed January 11, 1911. Serial No. 602,022.

in combinationa portable vehicle support ing a preliminary screening device in which the material is screened and heated, and a device for heating the material to the desired temperature and also including means tomake the apparatus self-feeding.

The invention consists of the parts and the construction and combination of parts, as hereinafter more fully described and claimed, having reference to the accompanying drawings in which-' Figure 1 is aside elevation of the apparatus partlybroken awa Fig. 2 is an end view of the apparatus s owing the driving gear. Fig. 3 is a transverse section through the main heating drum showing the carrier blades.

In the present embodiment of my invention 2 is a truck frame mounted upon suitable wheels 3 and carrying a main rotary drying and heating drum 4, supported at a suitable incl'nation upon roller bearings 5, appropriatel journaled on the frame 2. Power is tran mitted to the drum 4 by means of a suitable gearing, here shown as comprising a. sprocket chain -6 running around the drum body and over an appropriate sprocket wheel 7 'secured upon a shaft 8 which is coupled to a drivingt shaft 9 by a suitable universal joint 10. he driving shaft 9 is provided with a gear 11 whereby power is derived from any suitable source or prime motor.- There is also connected to the shaft 9 by means of a sprocket chain or equivalent device 12 a countershaft 13 suitably journaled on the truck and carrying a sprocket wheel 14 over which is led the sprocket chain 12.

By means of a sprocket wheel 15, secured on the shaft 13, and its respective sprocket chain 16, power is led'to a head shaft 17 supported in journals mounted upon a supertaneously wheel 24.

structure 19 carr 'ng a rotary screen 20. The chain 16 drives a sprocket wheel 18 fastened on the'hea dshaft 17 and from the shaft 17 poweris'transmitted by'suitable sprocket gearingor equivalent. mechanism 7 21 to drive a shaft .22; suitably connected to and driving the rotary screen 20.

By the system of gearing hereinbefore described, it isapparent that the main drum 4 and the rotary from one driving shaft at proper speeds determined by the proportion of the respective gears.

Material to be screened is carried u'pwardly from a suitable source of supply by a conveyer belt 23 driven by upper and lower sprocket wheels 24, the former of which is secured uponthe headshaft '17 and driven thereby, and the lower 'is secured upon a foot shaft 25 which is preferably arranged to one side of the truck 2 and projects beyond the fore wheel 3 so that the truck can be adjusted closely besidea pile of sand or other material to be treated. B

this convenient arrangement of the sand conveyor 23 a single operator can attend to 'all the requirements of the machine and keep the conveyer supplied by simply shov-v ing the sand in a pile overto the foot tion of which is inclined a d discharges unto the interior of the large main' heater-4. The coarse particles of material which fail to pass through the perforations of the screen 20 are discharged at its lower end into a waste trough 29 and such material as passes through the screen walls falls into the inclined portion of the housing 28 and travels downwardly into the drum 4.

For the purpose of heating the material in the drum 4 during its rotation a suitable oil burner or other e uivalent device for supplyin heat to the interior of the drum is provi ed, as indicated at 30. When an oil burning heater is utilized, oil and fluid under pressure is led to the. same from convenient sources and the rear end 4 of the which leads the sand screen "can be driven'simu'l rotary drum is preferably closed and provided with a heat resisting lining, as at 4. The incoming jet of flame striking against the rear fireproof wall- 42 is deflected and rises tothe upper portion of the drum,

- rial can be continuously handled it is necessary to accelerate the heating and drying to the greatest extent thus producing an efficient, practical, large capacity drier, and I have found that by providing the interior of the drum 4 with a plurality of radially projecting longitudinal flanges 31 these will pick up the sand or other material discharged into the drum from the housing 28 and carry it upwardly, as indicated by the arrow a Fig. 3, and precipitate it in a constant shower throughout the area of the drum. As shown some of these flanges 31 are simple angle irons appropriately secured to the interior of the drum, while others are in the form of 2 bars which form pockets 32 to catch sand on the upwardly revolving side of the drum and later gradually spill .the sand as the pocket is inverted. By this means the sand is given a preliminary-drying treatment in the screen from which the finer particles fall into the housing 20, thence gravitate into the rotary drum 4, by which it is elevated and showered through the heating gases from the combustion of the oil at the burner and finally discharged, heated to a roper degree, through a series of perforations 33 formed in the periphery of the lower end of the drum. I

Having thus described my invention,- what I claim and desire to secure by Letters Patent is- -1. A drying apparatus comprisin'g a rotary screen, a rotary drying drum, a burner whereby heated gases can be generated within said drum, and a housing for conveying the products of combustion from said drum around and to heat the screen, said drum having itsrear end closed and said closed end adapted to deflect the products of combustion and cause the same to return to'the burner end of the drum.

2. A drying apparatus comprising a rotary screen, arotary drying. drum, a burner whereby heated gases can be generated within' said drum, a housing for conveying the products vof combustion from said drum around and to heat the screen,'said drum having its rear end closed and said closed end adapted to deflect theproducts of combustion and cause the same to return to the burner end of the drum, and a drlvmg mechanism for said rotary members.

3. A drying apparatus comprising arotary screen, a rotary drying drum, a burner whereby heated gases can be generated within said drum, a housing for conveying the products of combustion from said drum around and toheat the screen, said drum havin its rear end closedand said closed end adapted to deflect the products of combustion and cause the same to return to the burner end of the drum, a driving mechanism for said rotary'members, and a portable supporting truck.

4. A portable drying apparatus comprising a screen, means for revolving said screen, a heating drum, means for revolving said drum, means for heating the interior of the drum, a housing conveying the heated air of the drum to and around the screen, said drum having its rear end closed and said closed end adapted to deflect the products of combustion and cause the same to re turn to the burner end of the drum, and a conveyer to deliver material to the screen.

" In testimony whereof Ihave hereunto set F. E. MAYNARD, J. H. HERRING. 

